CN1198678C - Method and apparatus for wet type flue-gas desulfurization - Google Patents
Method and apparatus for wet type flue-gas desulfurization Download PDFInfo
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- CN1198678C CN1198678C CNB01803828XA CN01803828A CN1198678C CN 1198678 C CN1198678 C CN 1198678C CN B01803828X A CNB01803828X A CN B01803828XA CN 01803828 A CN01803828 A CN 01803828A CN 1198678 C CN1198678 C CN 1198678C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
A wet flue gas desulfurization apparatus which is equipped with a nozzle 11 attached to an absorbing tower 1 and method based on the apparatus, the absorbing tower 1 having a liquid holding tank 2 for an absorbing solution b (containing an absorbing agent a) to which a combustion exhaust gas d containing sulfur dioxide is introduced; and a wet type flue-gas desulfurization method using the apparatus. The nozzle 11 has a delivery port 12 opening in the absorbing solution b, is connected to a pump 13 recycling the absorbing solution b with a pipe 15, and has a throttle 14 and a pipe 17 for absorbing air having an opening 18 which are disposed downstream from the pipe 15 in this order. The throttle 14 has an effective cross-sectional area being less than that of the nozzle 11 disposed downstream from the opening 18 so that a negative pressure region is generated downstream from the throttle, and as a result, a gas-liquid mixed phase stream of the absorbing solution b with fine air bubbles is formed in the negative pressure region and is jetted from the opening 18 of the nozzle, to thereby oxidize a sulfite in the liquid holding tank 2 into a sulfate.
Description
Technical field
The present invention relates to wet type flue gas desulfurization equipment and wet type flue gas desulfurization method.
Background technology
In the past, in production living space, used the burner as boiler as factory or mansion etc.In such burner, make fuel combustion.At this moment, if contain sulfur component in the fuel, sulfur component can not be fixed in the ashes and as sulfur dioxide (SO
2) emitted.Become acid rain by the sulfur dioxide of being emitted and fall into undergroundly, give human body, animal, natural environment brings bad influence.In order not produce this bad influence, flue gas desulfurization equipment is set in burner generally.
The great majority that are installed in the flue gas desulfurization equipment on the large-scale combustion apparatus are wet types.In such flue gas desulfurization equipment, make exhaust and alkaline absorption solution as limewash carry out gas-liquid and contact, sulfur dioxide is become sulphite.Like this, sulphite is absorbed in the absorption liquid and is removed.Have again, make sulphite and air carry out oxidation reaction and become sulfate.As the technology of oxidation reaction, generally adopt the technology that in absorption liquid, is blown into air.
In absorption liquid, be blown in the technology of air and require the oxidation reaction high efficiency.Therefore, developed various in the past technology.
Fig. 1 represents the wet type flue gas desulfurization equipment of the 1st conventional example.The wet type flue gas desulfurization equipment 101 of the 1st conventional example has the absorption tower 102 of carrying out wet type desulfurizing, and the storage liquid container 103 of alkaline absorption solution a is accumulated in configuration below absorption tower 102.In absorption liquid a, import the alkaline absorbent b of lime etc.Absorption liquid a is by the spraying that raises up in absorption tower 102 of circulating pump 104, pipe arrangement 105 and playpipe 106.The burning and gas-exhausting c that 102 top is imported into from the absorption tower contacts with the alkaline absorption solution a gas-liquid of the spraying that raised up, and sulfur dioxide in the exhaust and alkaline absorption solution reaction generate sulphite.Sulphite is absorbed by liquid absorption the whereabouts, is collected in the storage liquid container 103.Air d in the atmosphere is blown among the absorption liquid a that contains sulphite by air blast 107.Air blast 107 is connected with a plurality of spray nozzle manifolds 108 of bottom one side that is configured in storage liquid container 103, and air is blown into the absorption liquid a from the jet 110 of spray nozzle manifold 108 extended air supply nozzles 109 lower ends.Sulphite among the absorption liquid a carries out oxidation reaction with the air that is blown into and becomes sulfate.Be absorbed among the absorption liquid a sulfur dioxide in theory the sulfate of equivalent become discharge opeing e and be discharged from.Absorption efficiency in the oxidation technology that is blown into according to such air is subjected to what the tremendous influence of gas-liquid contact area of air and absorption liquid.
Fig. 2 represents the wet type flue gas desulfurization equipment 111 of the 2nd conventional example.The wet type flue gas desulfurization equipment 111 of the 2nd conventional example has mixer 112.Mixer 112 has agitator 113, makes among the absorption liquid a of agitator 113 in storage liquid container 103 to rotate.The air that is imported into by air blast 107 is blown into the absorption liquid a from the jet 114 that is configured in agitator 113 positive sides.The air that is blown into is accompanied by the injection stream that generates by agitator 113 to be disperseed in absorption liquid a.This technology can be by the dispersion accelerating oxidation reaction of air.
Japan is real to open in flat 4-137731 number, discloses the wet type flue gas desulfurization equipment 121 of the 3rd conventional example as shown in Figure 3.Angle with regulation is provided with a plurality of nozzles 117 in order to be blown into injection stream 116 mutually on the direction of the footpath of reservoir 115.A plurality of injection streams 116 is set at the height of regulation, and the injection stream of coming from nozzle 117 is towards the peripheral direction of reservoir 115.The absorption liquid pipe 119 that is communicated with and has jet-pump 118 in the base portion configuration of nozzle 117 with reservoir 115.The openend that air pipe arrangement 120 is set midway at absorption liquid pipe 119.Air d is attracted in the absorption liquid that flows in absorption liquid pipe 119 and is ejected to reservoir 115 from nozzle 117 with absorption liquid a.The technology of this ejection gas-liquid flow can further promote absorption liquid and Air mixing.
Fig. 4 A represents the wet type flue gas desulfurization equipment 131 of the 4th conventional example.Discharge pipe 122 is from the perisporium injection of reservoir 123.Attract absorption liquid by liquid pump 124 from reservoir 123, by circulation fluid pipe 125 and discharge pipe 122 circulations.Shown in Fig. 4 B, air is blown into the end of pipe 126 in the circulation fluid of the injection midway pipe 125 of circulation fluid pipe 125.It is roughly consistent that the air that air is blown into pipe 126 the 126a of export department is emitted the flow direction of the absorption liquid in direction 127 and the circulation fluid pipe 125.Being blown into pipe 126 end by the air of force feed from air by air blast 128 emits direction 127 towards air and is emitted.Like this, air mixes with absorption liquid a in the circulation fluid pipe 125, from discharge pipe 122 spues absorption liquid to reservoir 123.
Though above-mentioned the 1st to the 4th conventional example is respectively outstanding oxidation promotion technology, is leaving over the following problems point.
In the 1st conventional example,, there is obstacle on this aspect of inspection operation in storing liquid container 103 owing to spread all over ground configuration a plurality of air supply nozzle 109 in approximately full field on the bed surface of storing liquid container 103 bottoms.
In the 2nd conventional example, be accompanied by ejection from the air of ejiction opening 114 ejection because the air lift effect produces ascending air.The narrow territory circulation that a part of liquid that this ascending air growth encourage spues agitator 113 sucks again.The arrival of consequently stirring liquid stream is apart from shortening and reducing stirring efficiency.
In the 3rd conventional example and the 4th conventional example, from the absorption liquid pipe 119 that is connected with nozzle 117 or discharge pipe 122 or the air of supply midway of circulation fluid pipe 125.Therefore, air bubble with liquid in absorption liquid pipe 119 or circulation fluid pipe 125 in the process of flowing, the phase that a part of integrator of air bubble hugeization that become, injection stream are separated into air and absorption liquid are mutually.In this state, the air bubble from the gas-liquid mixed stream that nozzle 117 or discharge pipe 122 spued distributes unequally, is difficult to carry out oxidation smoothly.Also have, the inner face of pipe is owing to the cavitation erosion corrosion is corroded easily.
Pursue further increase and improve the dispersed with stirring ability of absorption liquid significantly of gas-liquid contact area, wish this increaseization and dispersibility be wide area and also be impartial.Have, by reducing the quantity of air supply nozzle significantly, hope realizes the facilitation according to the inspection operation of the simplification in the reductionization of power and the storage liquid container again.
Summary of the invention
Therefore, the purpose of this invention is to provide wet type flue gas desulfurization equipment and the wet type flue gas desulfurization method that the gas-liquid contact area further is increased.
Other purpose of the present invention provides the wet type flue gas desulfurization equipment and the wet type flue gas desulfurization method that air and absorption liquid can be stirred fully, disperse.
Other purpose of the present invention provides the wet type flue gas desulfurization equipment and the wet type flue gas desulfurization method that can reduce power by the quantity that reduces the air supply nozzle significantly.
Other purpose of the present invention provides by simplifying the storage liquid container and makes warm formula flue gas desulfurization equipment and the wet type flue gas desulfurization method of checking that operation is carried out easily.
In viewpoint of the present invention, wet type flue gas desulfurization equipment comprises: desulfurizer, and it forms sulphite to remove sulfur dioxide from burning and gas-exhausting; The storage liquid container, its storage contains the absorption liquid of absorbent and described sulphite; And air supply EGR, it supplies air to described storage liquid container with the described sulphite of oxidation, it is characterized in that, and described air supply EGR comprises: nozzle, it has discharge opening open in described storage liquid container; First pump, it will supply to described nozzle circularly at the described absorption liquid in the described storage liquid container; Pipe arrangement, it connects the discharge opening of described nozzle and described first pump; Choke valve, it is configured between described pipe arrangement and the described nozzle; And air attraction tube, it is configured in the downstream of described choke valve, and is connected with described nozzle; Described choke valve comprises choke block, described choke block has throttle orifice and centers on the peripheral part of described throttle orifice, and described peripheral part is outstanding to the upstream side of liquid stream, and tilts downwards with respect to the liquid level in described storage liquid container at the central axis of the above nozzle of flow direction.
And, described throttle orifice has the effective cross section narrower than the effective cross section of described pipe arrangement, and described air attracts tube to be introduced into, to flow in described nozzle and spray in the described storage liquid container with the described sulphite of oxidation in described absorption liquid with described absorption liquid by described air.
Also have, the center line of the path direction in the best aforementioned nozzle and the aforementioned choke valve of orthogonal direction and and the center line of aforementioned air suction tube between the isolation distance of aforementioned path direction than spue 2 times of weak points of effective diameter of stream of the absorption liquid of aforementioned nozzle.In this case, the effective diameter of aforementioned throttle bore is set in aforementioned absorption liquid and spues in 0.5～0.8 times the scope of effective diameter of stream.
Also have, side is smoothly by hole enlargementization for the downstream for the inner peripheral surface of best aforementioned throttle bore, and the upstream side of the opening peripheral part of aforementioned throttle bore part is advisable towards upstream side is outstanding shrilly.
In addition, aforementioned nozzle can have and prolongs tube, and the aforementioned tube that prolongs is advisable from the outside of aforementioned storage liquid container is extended aforementioned absorption liquid to the aforementioned storage liquid container.
Also have, the central shaft that is preferably in the stream that the inside of aforementioned nozzle forms tilts downwards with respect to the liquid level of aforementioned storage liquid container.
In addition, best aforementioned air and draw the tube one end be connected with aforementioned nozzle, the other end is opened in the atmosphere.
Also have, aforementioned air attracts tube can have below part and upper section, and aforementioned below partly is fixed on the aforementioned nozzle, aforementioned upper section towards upper and lower to movably partly being supported for suitable by aforementioned below.In this case, at aforementioned pump stopping period, the open end of opening in atmosphere of aforementioned air attraction tube is set in than the high position of liquid level of the aforementioned absorption liquid of aforementioned storage liquid container and is advisable.
Also have, aforementioned nozzle can have: the downstream tube that is positioned at aforementioned choke valve downstream be connected with aforementioned downstream tube in the downstream the prolongation tube; Aforementioned prolongation tube is fixed in the aforementioned storage liquid container, and aforementioned downstream tube can be connected removably freely on the aforementioned prolongation tube and be advisable.
Also have, the removal sulfur dioxide system also can have absorption tower, playpipe, reach second pump, and this absorption tower imports the previous combustion exhaust that comprises aforementioned sulfur dioxide; This playpipe is arranged on the bottom on aforementioned absorption tower; In order to spray aforementioned absorption liquid from aforementioned playpipe in aforementioned absorption tower, this second pump is supplied to aforementioned playpipe from aforementioned storage liquid container with aforementioned absorption liquid.
In other viewpoint of the present invention, the wet type flue gas desulfurization method is reached by following steps: the liquid of liquid level that attracts to contain the chemical substance of oxidation object forms the liquid stream of aforementioned liquids; The aforementioned liquid stream of throttling aforementioned liquids; In the negative pressure area that produces by aforementioned throttling, import air and generate the gas-liquid multi-phase flow; Aforementioned gas-liquid multi-phase flow is injected on the aforementioned liquids layer.
Also have, best aforementioned injection direction with respect to the liquid level of aforementioned liquids layer towards the below.
Description of drawings
Fig. 1 is the profile of the flue gas desulfurization equipment of expression the 1st conventional example.
Fig. 2 is the profile of the flue gas desulfurization equipment of expression the 2nd conventional example.
Fig. 3 is the profile of the flue gas desulfurization equipment of expression the 3rd conventional example.
Fig. 4 A and 4B are the profiles of the flue gas desulfurization equipment of expression the 4th conventional example.
Fig. 5 is the profile of expression wet type flue gas desulfurization equipment of the present invention.
Fig. 6 is the profile of the nozzle that spues of the 1st embodiment in the expression wet type flue gas desulfurization equipment of the present invention.
Fig. 7 is the profile of the nozzle that spues of expression the 2nd embodiment.
The specific embodiment
Below, with reference to accompanying drawing, explain wet type flue gas desulfurization equipment of the present invention.
Fig. 5 represents the wet type flue gas desulfurization equipment of the 1st embodiment according to the present invention.With reference to Fig. 5, the absorption tower 1 of carrying out wet type desulfurizing is provided with storage liquid container 2.Absorption tower 1 is configured in the top of storage liquid container 2.In storage liquid container 2, import water.From the top of this water surface, absorbent a is imported in this water by pipe arrangement 3.Form absorption liquid b by this water and absorbent a.
In the sulfur dioxide absorption system, part disposes playpipe 4 below absorption tower 1.A plurality of absorption liquid discharge openings 5 are set with spuing absorption liquid upward on playpipe 4.The below on absorption tower 1 is by opening, and the inner space on absorption tower 1 is connected with the top of the inner space of storage liquid container 2.Between the inside of playpipe 4 and storage liquid container 2, configuration is used to make the circulation pipe arrangement 6 of absorption liquid b circulation.Folder is being established circulating pump 7 on pipe arrangement 6.The absorption liquid of storage in the liquid container 2 is inhaled into by circulating pump 7, spued from the absorption liquid discharge opening 5 of playpipe 4.The part of the absorption liquid b that is spued from circulating pump 7 is discharged from as discharge opeing c.
Top at storage liquid container 2 is provided with flue 8.The field, below of flue 8 is connected with the inner space of storage liquid container 2.Import the inside on absorption tower 1 from the introducing port 9 of burning and gas-exhausting d 1 upper end that the burner as boiler (figure does not show) is discharged from the absorption tower.The burning and gas-exhausting of removing behind the sulfur dioxide is discharged to the atmosphere as cleaning the end of exhaust e from flue 8.
In air supply system, nozzle 11 runs through on the following quadrate part that wherein is configured in storage sidewall of liquid container 2 or perisporium.Inboard front end at nozzle 11 forms discharge opening 12.Absorption liquid b in the storage liquid container 2 is attracted by pump 13 from the intake 32 of storage liquid container 2, is spued from nozzle 11 by pipe arrangement 15.
As shown in Figure 6, nozzle 11 has choke valve 14.The exhaust end of choke valve 14 and pump 13 is connected with pipe arrangement 15.Direction from the choke valve 14 of nozzle 11 towards discharge opening 12 is provided with downstream side neck 41.On tube 41, connecting long prolongation tube 42 by engaging with flange 43.Prolong stream 16 prolongation in storage liquid container 2 that spues of absorption liquid that tube 42 will form as the internal flow path of nozzle 11.
Spue and connecting air suction tube 17 on the tube 41 of stream 16 forming absorption liquid.Air suction tube 17 has in the downstream of choke valve 14 for the spue opening 18 of stream 16 of absorption liquid.Particularly air suction tube 17 forms the circumferential surface sections opening of tube 41 in the downstream.The other end side opening 19 of air suction tube 17 is opened in atmosphere.The height and position of opening 19 is set at than the high position of liquid level in the storage liquid container 2.As shown in Figure 6, the absorption liquid central axis L of stream 16 10 degree that with respect to the horizontal plane approximately tilt that spue, it is lower than upstream side to form the downstream.
Choke valve 14 has the flange 21 of pipe arrangement 15 sides, the flange 22 and the choke block 23 of discharge opening 12 sides.Choke block 23 has throttle orifice 24.The central shaft of the path direction of throttle orifice 24 is consistent with the central axis L of stream.The spue parameter of discharge flow in the cross-sectional area, 13 unit interval of pump of stream 16 etc. of the big or small corresponding absorption liquid of throttle orifice 24 reasonably is provided with.
Alkaline absorption solution b attracted to circulating pump 7, sprays directly over roughly from a plurality of absorption liquid discharge openings 5 of playpipe 4.Lime solution among the alkaline absorption solution b that is sprayed like this contacts to react with sulfur dioxide gas-liquid the burning and gas-exhausting d that upper end introducing port 9 from absorption tower 1 is imported into and becomes sulphite.The clean exhaust e that removes behind the sulfur dioxide discharges outside by flue 8.The absorption liquid b that contains the sulphite of generation becomes droplet-like along with gravity fall is got back in the storage liquid container 2.
As described later, the mixed flow of air and absorption liquid sprays from the absorption liquid of discharge opening 12 to storage liquid container 2 of nozzle 11.Sulphite in the absorption liquid contacts with air and becomes sulfate.The absorption liquid that sulfate concentration uprises is discharged from as discharge opeing c.The absorbent a of lime etc. is added in the storage liquid container 2.
Near the gas-liquid mixed stream that spues from the nozzle 11 generation opening 18 of air suction tube 17.The liquid of the absorption liquid that spues from pump 13 stream A is because the choke block 23 of choke valve 14 is subjected to resistance as shown in Figure 6, as the liquid by throttle orifice 24 flow B inlet opening 18 near.Therefore, near generation negative pressure opening 18.That is, the pressure near the pressure ratio opening 19 the opening 18 reduces to some extent.Therefore, air has powerfully as air stream C in the zone that this is depressurized by air suction tube 17 and flows into very much.
Air stream C becomes the liquid stream B of absorption liquid into turbulent flow, is stirred the liquid stream b interflow of back and absorption liquid.Peel off the air-flow that this air stream of effect becomes fine air bubble according to contracted flow.The particle diameter of fine stream is more little can be prevented more effectively because the hypertrophyization of the air bubble of microfine combination each other.The spue gas-liquid mixed stream of stream 16 of absorption liquid in the nozzle 11 keeps this turbulent agitation characteristics.Gas-liquid mixed stream flows into the absorption liquid of storage liquid container 2 as the discharge opening 12 of burble from nozzle 11.Such burble is flow through near the distant place that arrives, bottom surface of storage liquid container 2 along with the downward-sloping liquid stream of about 10 degree emits.Because the flow velocity of burble is fast, burble has arrived a distant place before the combination of air bubble is advanced.At this moment, the air bubble state of keeping microfine floats over the upper portion of absorption liquid b.Therefore, the micro-air bubble has big gas-liquid contact area and contacts with absorption liquid, promotes the oxidation of sulphite.
When absorption liquid passes through the throttle orifice 24 of choke valve 14, because peeling off at the back side of choke valve of absorption liquid contracted flow produces negative pressure.The corresponding air that passes through the negative pressure that flow produces according to absorption liquid attracted to this negative pressure zone from the opening of air suction tube 17.Air that is attracted and absorption liquid stream B are mixed into multi-phase flow.Multi-phase flow sprays to absorption liquid b as the discharge opening 12 of strong injection stream from nozzle 11.At this moment, multi-phase flow is accepted peptizaiton from absorption liquid b.Therefore, multi-phase flow is accompanied by wake and forms bigger liquid stream in storage liquid container 2.The gas-liquid multi-phase flow that is accompanied by wake has big amount of exercise, and the extensive region in storage liquid container 2 is disperseed.Multi-phase flow is ejected, the field that is attracted by multi-phase flow absorption liquid b from 12 of discharge openings in according to the distance of the regulations such as density of spue footpath, the pressure that spues, the absorption liquid b of multi-phase flow effectively.Therefore do not cause the circulation in narrow and small zone, while the air bubble that is accompanied by in a large amount of gas-liquid multi-phase flow of wake is closed between this wake, has powerfully dispersedly and flow on it spues direction.Like this, can avoid air bubble effectively and become big air bubble in the interflow with making a snowman formula each other, can keep bubbles dispersion at wide spectrum.
With above-mentioned the 3rd and the 4th conventional example of entrained air is different fully by the nozzle that spues at upstream side, in the 1st embodiment, use at the spue negative pressure area that forms of the nozzle that spues of stream of generation midway to attract air, make multi-phase flow.Pressure and atmospheric poor air by negative pressure area is attracted, is sheared owing to the liquid stream of absorption liquid the bubble of the fine majority of formation.Like this, make multi-phase flow.The air bubble that is introduced among the absorption liquid b is not to be subjected to fierce more shearing force to be disperseed by miniaturization in spue back, the nozzle that spuing.Have again, imposing manner ground is arranged to the ejection of the outside of the nozzle that spues, in being accompanied by the big liquid stream of wake, keep the state of micro air bubble, be moved to a distant place by the bubble of miniaturization like this.Therefore, can not cause air bubble combination each other in pipe arrangement 42, the wide spectrum in absorption liquid is disperseed.Also have, can not cause that also forming 2 separating of air and absorption liquid flows mutually.
The micro air bubble that is dispersed in wide spectrum like this contacts with absorption liquid with big area, expeditiously the sulphite in this absorption liquid of oxidation.Increase the oxidability of 1 nozzle fully, can reduce the quantity that becomes the nozzle of obstruction when checking cleaning significantly.Owing to generate big liquid stream, can freely set the position that spues of multi-phase flow.Owing to pump 13 non-involvement bubbles, can reduce the power of pump.Owing to given birth to the increase promotion mixing effect of the liquid stream of wake.The air blast that needn't need air supply usefulness shown in aftermentioned embodiment, can not use air blast to realize high efficiency oxidation, particularly realizes complete oxidation.
(confirming example)
The specification that confirms device is as follows:
(1) sectional area on absorption tower 1 is 4 square metres, and the effective depth of 1 inside, absorption tower is 12m for playpipe 4.
(2) storage liquid container 2 sectional area be 2m * 4m, from the bottom surface to the relative altitude of playpipe 4 are 3.5m.
(3) 2 playpipes 4 are set, its nominal directly is 150A.4 nominals up are installed directly are the absorption liquid discharge opening 5 of 40A, length 100mm.
(4) nominal of pipe arrangement 15 directly is 150A.
(5) nominal of nozzle 11 directly is 100A, and the aperture of throttle orifice 24 is 75mm.Discharge opening 12 as mentioned above on the horizontal level that enters 0.4m from sidewall (with the relative sidewall of the distance of 2m) to the inside, be set in from the high position of bed surface (bottom surface) 0.5m.The central axis L of the stream of nozzle 11 is set at 10 ° with respect to the angle of inclination of bed surface (horizontal plane).
(6) nominal of air suction tube 17 directly is 40A.Interval between the center line of the throttleng surface direction of the center line of air suction tube 17 and choke valve 14 is set at 100mm.
(7) height and position of another distolateral opening 19 of air suction tube 17 exceeds 1m than liquid level.In such confirmation device, the oxidation at wide spectrum propelling homogeneous can realize above-mentioned complete oxidation by oxidation smoothly.
The height setting of the liquid level 31 of the absorption liquid b in the storage liquid container 2 is about 2.5m from the bottom surface.In order to make pump 13 can suck that the relative altitude of the suction inlet opened 32 and liquid level 31 is set at 2m on the sidewall of storage liquid container 2.The horizontal direction set positions of discharge opening 12 is the 0.4m from the medial surface of the sidewall that offers suction inlet 32.Circulation per hour attracts 200 cubic metres absorption liquid b with pipe arrangement 6.Air suction tube 17 per hour attracts the air of 180 cubic metres of N from opening 19.
The SO that contains about 1000ppm
2The burning and gas-exhausting d of per hour 40000 cubic metres of N be imported into absorption tower 1.On the one hand, per hour 500 cubic metres absorption liquid b is raised up by circulating pump 7 and is spread to the absorption tower 1 from playpipe 4.Burning and gas-exhausting d is desulfurized processing, sulfur dioxide SO
2With with its approximately absorbent a (lime stone) of equivalent reaction in theory, gypsum is discharged from as discharge opeing c.
Distance between the center line of the face direction of the choke block 23 of the center line of air suction tube 17 and choke valve 14 is fit to hydrodynamics ground and reasonably stipulates.It is short that preferably this distance is set at the length of 2 times of internal diameters than nozzle 11 (be absorption liquid spue the diameter of stream 16, the circle conversion diameter of net sectional area).If consider the attractability of air and discharging jet arrival degree, preferably be set at about 0.5～0.8 times of internal diameter of nozzle 11 as the diameter of the throttle orifice 24 in choke valve footpath to a distant place.Such regulation is to make become effectively experimentally criterion of flow in the corresponding pipe arrangement 15 of generation of negative pressure in choke valve 14 downstreams.If under the situation of this distance length, negative pressure can not take place effectively.
Below, the nozzle that spues of the wet type flue gas desulfurization equipment of the 2nd embodiment of the present invention is described.
With reference to Fig. 7, the nozzle of the wet type flue gas desulfurization equipment of the 2nd embodiment is connecting long prolongation tube 42 by engaging with flange 43 on the tube 41 in nozzle 11 downstreams between choke valve 14 and discharge opening 12.Discharge opening 12 forms the front opening that prolongs tube 42.Prolong tube 42 and prolonged the absorption liquid stream 16 that spues, run through the sidewall of storing liquid container 2.
Spue and connecting air suction tube 17 on the tube 41 of stream 16 forming absorption liquid.Air suction tube 17 has opening 18 in the downstream of choke valve 14 for the absorption liquid stream 16 that spues.Particularly, air suction tube 17 forms the circumferential surface sections opening of tube 41 in the downstream.Air suction tube 17 another distolateral openings 19 are open in atmosphere.When pump 3 stops not exist under the situation of vacuum flow B, the liquid level of liquid equates with the liquid level 31 of storage liquid container 2 in the air suction tube 17.Therefore, the height and position of opening 19 is set at liquid level 31 height than storage liquid container 2.The absorption liquid that forms as the internal flow path of the nozzle 11 central hub line L of stream 16 10 degree that with respect to the horizontal plane approximately tilt that spue, the downstream is lower than upstream side.
Choke valve 14 has the flange 21 of pipe arrangement 15 sides, the flange 22 and the choke block 23 of discharge opening 12 sides.Choke block 23 has throttle orifice 24.The spue central axis L of stream 16 of the central shaft of throttle orifice 24 liquid flow path directions and absorption liquid is consistent.The corresponding absorption liquid of the size of throttle orifice 24 spues the cross-sectional area, gas-liquid mixed phase of stream 16 with the variable of the discharge flow of the unit interval of pump 13, quantitatively reasonably design.
Air suction tube 17 forms 2 and heavily manages, and is formed by stationary pipes 17a and movable tubes 17b.When pump 13 stops, being thus lifted to fully high position in order not make hydrorrhea go out movable tubes 17b.During pump 13 was driven, owing to reduce according to the absorption liquid flow liquid face that spues, movable tubes 17b was reduced to low position.The total length of air suction tube 17 shortens, when the opening 19 of air suction tube 17 attracts air because the resistance force diminishes of the inner peripheral surface of air suction tube 17.
The tube 41 of engagement nozzle 11 can be assembled removably freely with the flange 41a and the 42a that prolong tube 42.The plural part 41a that the thickness of flange of tube 41 sides is big embeds in the slot part of the plural number that prolongs tube 42 sides.The big plural part 42a of thickness of flange that prolongs tube 42 sides embeds in the slot part of the plural number that prolongs tube 42 sides.Prolong tube 42 and be installed in usually on the storage liquid container 2, the one thing that comprises tube 41 and choke valve 14 can be installed in removably freely and prolong on the tube 42, and choke valve 14 can be changed aptly.
Choke block 23 has throttle orifice 24.The opening peripheral part of throttle orifice 24 upstream side is rolled.Like this, the opening peripheral part has sharp-pointed angle at the front end of upstream side, has non-sharp-pointed shape in the downstream.Its opening peripheral part, from upstream side part 23a downstream side part 23b directly become big.That is, the inner peripheral surface of the inner peripheral surface of upstream side part 23a and downstream part 23b forms level and smooth curved surface continuously, and this curved surface forms trumpet-shaped taper seat (perhaps doubtful taper seat).This taper seat downstream aperture efficiency upstream side opening becomes big continuously.Also have, as shown in Figure 7, the upstream side leading section of choke valve 14 with the opposition side of the opening 19 of air suction tube 17 in, the opening 19 that cans be compared to air suction tube 17 most is the most side-prominent.
Liquid stream in the pipe arrangement 15 is stripped from upstream side part 23a with cutting off, forms countless fine holes at upstream side part 23a.Fine countless hole like this is dispersed to again by in the liquid of the negative pressureization stream, and fine so countless hole disperses, and has in the liquid stream of negative pressureization again, and the air bubble that is imported into from air suction tube 17 is drawn into this liquid effectively to be disperseed.
As mentioned above, according to wet type flue gas desulfurization equipment of the present invention, synergism by wide regional coverage and mixed phase, the gas-liquid contact area increases equably at wide spectrum and in each place, can not produce because the different inequalities that produce oxidation in place, can realize complete oxidation or near complete oxidation.
Claims (13)
1. wet type flue gas desulfurization equipment, it comprises:
Desulfurizer, it forms sulphite to remove sulfur dioxide from burning and gas-exhausting;
The storage liquid container, its storage contains the absorption liquid of absorbent and described sulphite; And
Air supply EGR, it supplies air to described storage liquid container with the described sulphite of oxidation,
It is characterized in that described air supply EGR comprises:
Nozzle, it has discharge opening open in described storage liquid container;
First pump, it will supply to described nozzle circularly at the described absorption liquid in the described storage liquid container;
Pipe arrangement, it connects the discharge opening of described nozzle and described first pump;
Choke valve, it is configured between described pipe arrangement and the described nozzle; And
Air attracts tube, and it is configured in the downstream of described choke valve, and is connected with described nozzle;
Described choke valve comprises choke block, and described choke block has throttle orifice and centers on the peripheral part of described throttle orifice, and described peripheral part is outstanding to the upstream side of liquid stream, and
Central axis at the above nozzle of flow direction tilts downwards with respect to the liquid level in described storage liquid container.
2. wet type flue gas desulfurization equipment as claimed in claim 1, it is characterized in that, described throttle orifice has the effective cross section narrower than the effective cross section of described pipe arrangement, and described air attracts tube to be introduced into, to flow in described nozzle and spray in the described storage liquid container with the described sulphite of oxidation in described absorption liquid with described absorption liquid by described air.
3. wet type flue gas desulfurization equipment as claimed in claim 1, it is characterized in that, described choke valve and described air attract tube configuration like this, make and described nozzle in the center line of the above choke valve of direction of path direction quadrature and the distance between the center line that described air attracts tube, shorter than the spue twice of effective diameter of stream of the absorption liquid in described nozzle.
4. wet type flue gas desulfurization equipment as claimed in claim 1 is characterized in that, the effective diameter of described throttle orifice is set in described absorption liquid and spues in 0.5～0.8 times the scope of effective diameter of stream.
5. as each the described wet type flue gas desulfurization equipment in the claim 1 to 4, it is characterized in that described throttle orifice is funnel shaped, and have to the big diameter of the downstream of liquid stream change.
6. as each the described wet type flue gas desulfurization equipment in the claim 1 to 4, it is characterized in that described nozzle has and prolongs tube, the described tube that prolongs is from the outside of described storage liquid container is extended described absorption liquid to the described storage liquid container.
7. as each the described wet type flue gas desulfurization equipment in the claim 1 to 4, it is characterized in that described air attracts tube one end to be connected with described nozzle, the other end is opened in the atmosphere.
8. as each the described wet type flue gas desulfurization equipment in the claim 1 to 4, it is characterized in that, described air attracts tube to have below part and upper section, described below partly is fixed on the described nozzle, and described upper section is supported by described below part to movably towards upper and lower.
9. wet type flue gas desulfurization equipment as claimed in claim 7 is characterized in that, when described pump stopped, the other end of opening in atmosphere of described air attraction tube was set in the high position of liquid level than the described absorption liquid of described storage liquid container.
10. as each the described wet type flue gas desulfurization equipment in the claim 1 to 4, it is characterized in that described nozzle comprises:
The downstream tube is positioned at described choke valve downstream; And
Prolong tube, be connected the downstream of described downstream tube;
Described prolongation tube is fixed in the described storage liquid container, and described downstream tube can be connected on the described prolongation tube freely removably.
11. each the described wet type flue gas desulfurization equipment as in the claim 1 to 4 is characterized in that described desulfurizer comprises:
The absorption tower imports the described burning and gas-exhausting that comprises described sulfur dioxide;
Playpipe is arranged on the bottom on described absorption tower;
Second pump supplies to described playpipe from described storage liquid container with described absorption liquid, and described absorption liquid is ejected in the described absorption tower from described playpipe.
12. a wet type flue gas desulfurization method is characterized in that, this wet type flue gas desulfurization method may further comprise the steps:
The liquid that will contain as the chemical substance of oxidation object is attracted in the storage liquid container, and forms the liquid stream of described liquid;
Reduce the diameter of the described liquid stream of described liquid by choke valve, produce reduced pressure zone with downstream at described choke valve, wherein said choke valve comprises choke block, and described choke block has throttle orifice and centers on the peripheral part of described throttle orifice, and described peripheral part is outstanding to the upstream side of liquid stream;
Air is incorporated in the described reduced pressure zone, to produce the gas-liquid multi-phase flow; And
Described gas-liquid multi-phase flow is ejected in the described storage liquid container.
13. wet type flue gas desulfurization method as claimed in claim 12 is characterized in that, described injection direction with respect to the liquid level of described liquid level towards the below.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000351802 | 2000-11-17 | ||
| JP351802/2000 | 2000-11-17 | ||
| JP275254/2001 | 2001-09-11 | ||
| JP2001275254A JP3854481B2 (en) | 2000-11-17 | 2001-09-11 | Wet flue gas desulfurization apparatus and wet flue gas desulfurization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1395499A CN1395499A (en) | 2003-02-05 |
| CN1198678C true CN1198678C (en) | 2005-04-27 |
Family
ID=26604233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB01803828XA Expired - Lifetime CN1198678C (en) | 2000-11-17 | 2001-11-14 | Method and apparatus for wet type flue-gas desulfurization |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US6787114B2 (en) |
| EP (1) | EP1243308B1 (en) |
| JP (1) | JP3854481B2 (en) |
| CN (1) | CN1198678C (en) |
| DK (1) | DK1243308T3 (en) |
| ES (1) | ES2263673T3 (en) |
| WO (1) | WO2002040137A1 (en) |
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| TWI720589B (en) * | 2018-12-11 | 2021-03-01 | 日商三菱動力股份有限公司 | Gas-liquid mixing device and exhaust gas desulfurization device with gas-liquid mixing device |
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| US6695018B2 (en) * | 2002-06-10 | 2004-02-24 | The Babcock & Wilcox Company | Collection scoop for flue gas desulfurization systems with bleed streams or ex situ forced oxidation |
| CN101171031B (en) * | 2005-05-05 | 2011-09-28 | 默沙东公司 | Peptide conjugate compositions and methods for the prevention and treatment of alzheimer's disease |
| JP5259964B2 (en) * | 2007-02-28 | 2013-08-07 | 三菱重工業株式会社 | Seawater flue gas desulfurization system |
| US8540219B2 (en) | 2007-03-16 | 2013-09-24 | Alstom Technology Ltd | System and method for preventing scaling in a flue gas desulphurization system |
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| US9028762B2 (en) * | 2012-07-30 | 2015-05-12 | Mitsubishi Hitachi Power Systems, Ltd. | Wet type exhaust gas desulfurization apparatus |
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| CN103566748B (en) * | 2013-11-21 | 2015-06-17 | 航天环境工程有限公司 | Stirring wet type exhaust smoke desulfurization device for sintering machine |
| CN103566744B (en) * | 2013-11-21 | 2015-11-04 | 航天环境工程有限公司 | Sintering machine gas-liquid mixed wet type flue gas desulfurization equipment |
| DE102013225615B4 (en) | 2013-12-11 | 2022-01-20 | KSB SE & Co. KGaA | Device and method for flue gas desulfurization |
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| JP6588147B1 (en) * | 2018-12-11 | 2019-10-09 | 三菱日立パワーシステムズ株式会社 | Exhaust gas desulfurization equipment |
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- 2001-09-11 JP JP2001275254A patent/JP3854481B2/en not_active Expired - Lifetime
- 2001-11-14 WO PCT/JP2001/009954 patent/WO2002040137A1/en active IP Right Grant
- 2001-11-14 ES ES01982780T patent/ES2263673T3/en not_active Expired - Lifetime
- 2001-11-14 EP EP01982780A patent/EP1243308B1/en not_active Expired - Lifetime
- 2001-11-14 DK DK01982780T patent/DK1243308T3/en active
- 2001-11-14 CN CNB01803828XA patent/CN1198678C/en not_active Expired - Lifetime
- 2001-11-14 US US10/169,080 patent/US6787114B2/en not_active Expired - Lifetime
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2004
- 2004-05-24 US US10/851,331 patent/US6932952B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI720589B (en) * | 2018-12-11 | 2021-03-01 | 日商三菱動力股份有限公司 | Gas-liquid mixing device and exhaust gas desulfurization device with gas-liquid mixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| DK1243308T3 (en) | 2006-09-18 |
| US20030012706A1 (en) | 2003-01-16 |
| CN1395499A (en) | 2003-02-05 |
| ES2263673T3 (en) | 2006-12-16 |
| EP1243308A4 (en) | 2003-04-23 |
| JP3854481B2 (en) | 2006-12-06 |
| WO2002040137A1 (en) | 2002-05-23 |
| EP1243308A1 (en) | 2002-09-25 |
| US6787114B2 (en) | 2004-09-07 |
| US6932952B2 (en) | 2005-08-23 |
| EP1243308B1 (en) | 2006-05-31 |
| JP2002210326A (en) | 2002-07-30 |
| US20040213722A1 (en) | 2004-10-28 |
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